2018 Porsche 911 4.0 991 GT3

Overview

• Make: Porsche
• Model: 911
• Trim: 991 GT3
• Version: 4.0 991 GT3 PDK RWD Euro 6 2dr (492 bhp)
• Year: 2018
• Mileage: 17,974 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 2 seats
• Engine: 4.0 litres, 492 bhp
• Gearbox: Automatic (PDK)
• Drive: Rear-wheel drive
• Colour: Yellow
• CO2: 288 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Porsche 911 991 Gt3 is advertised with 17,974 miles, approximately 2,700 below the typical mileage for its age. Priced at £145,000, it is advertised £5,764 above the AskCar estimate of £139,236. The AskCar estimate uses UK dealer asking prices, including 1,947 Porsche 911 adverts, and accounts for the car’s age, mileage and specification. We first saw this car advertised 35 days ago. Its asking price has since fallen by £3,750. The recorded MOT expired on 24 June 2026, so ask the dealer whether it has been renewed. We checked its advertised mileage against the government's MOT record, and they match. The seller is JCT600 Approved Leeds, based in Leeds. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Fair price: £5,764 (4%) over the AskCar estimate of £139,236.

The AskCar estimate is our expected asking price for this car. It uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It is an advertised price, not a confirmed sale price.

It draws on 1,947 priced Porsche 911 adverts across different ages and specifications, as of 4 November 2026.

A 2018 Porsche 911 with the 4.0 petrol engine is typically advertised at £136,000: the median of the 14 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2018 Porsche 911 has been on sale for at least 35 days.

Price history

AskCar first saw this advert on 30 September 2026 at £148,750. Its asking price is now £145,000, £3,750 less. The latest price cut was seen on 25 October 2026.

Price changes recorded:

• 30 September 2026: £148,750
• 15 October 2026: £148,000
• 25 October 2026: £143,500
• 31 October 2026: £145,000

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: the latest record we hold ran out on 24 June 2026; ask the dealer for the current MOT.

It has had 5 MOTs. The latest, on 25 June 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 15,893 miles, which matches the advertised 17,974 miles.

Advertised mileage is about 2,700 miles lower than the median mileage of a 2018 Porsche 911 on AskCar.

Similar cars

4 other 2018 Porsche 911 991 GT3 4.0 petrol automatic coupes are for sale at UK dealers, from £129,990 to £134,995, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2018 Porsche 911 991 GT3, 4.0 petrol coupe, red. Mileage: 16,000 miles. Price: £129,990, £15,010 less than this car. Dealer: Hills Prestige in Lymington. AskCar page: https://askcar.co.uk/car/porsche-911-2018-bb3ba153000a
• 2018 Porsche 911 991 GT3, 4.0 petrol coupe, blue. Mileage: 20,000 miles. Price: £134,949, £10,051 less than this car. Dealer: DMB Collection Thirsk in Thirsk. AskCar page: https://askcar.co.uk/car/porsche-911-2018-1198047cd941
• 2018 Porsche 911 991 GT3, 4.0 petrol coupe, grey. Mileage: 26,607 miles. Price: £134,990, £10,010 less than this car. Dealer: Baytree Cars in Derby. AskCar page: https://askcar.co.uk/car/porsche-911-2018-7cd52e00708d